Combined type-writing and computing machine.



F. A. HART.

`COlVllNl-ID TYPE WRlTING AND COMPUTINGMACHINE.

APPLICATION FILED SPT. 16, 1914.

Patented July 4, 1916.

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F. A. HART. l COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION FILED SVEPT. 1G. 1914- 1,189,447.

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UNITED sTATiisy PATENT onirica FREDERICK A. HART, OF NEWARK, NEW JRSY, ASSIGNOR T0 UNDERWOD COivIlP'lv ING MACHINE-COMPANY, 0F NEW YORK, N. Y., A CORPRATIONv 0F NEW YORK.

lCOMBINED TYPE-WRITING COMPUTING MACHINE.

Specification of Letters Patent.

Original application led December 10, 1908, Serial No. 466,836. Divided and this application filed Septeix'iter e 16, 1914. Serial No. 861,936.

plied to al combined typewriting and com-A puting machine of the general kind shown in the UnitedStates patent to Hans Hanson, No. 905,421, dated December 1, 1908. Insaid patent a typewriting machine is provided with the usual carriage, and the computation device connected thereto includes denomination or computation bars, which are normally in ineffective position.l Said bars are however, by the travel of the typewriter carriage brought into effective position one at a time, with the result that if the numeral keys are operated,`the numeral key depressed will set up on the computation bar in effective. position, apin representing a digit printed by said numeral key. After a series of digits have thus been set up t'o represent a number, a general operator is caused't'o move forward, `engage `the depressedv pin and drive the computaltion bars thereby, each to an extent depend-i ing on the pin depressed.` ln thus being driven each turns its computing wheel to cause the number represented by the de-4 pressed pin to be carried into. 'its wheel.

This general operator i's then returned tov its normal idle position, and in solreti'irning restores the computation lbars and the pins 'thereof to their normal position. i

The present invention is especiallyv designed for making such machines proof against errors in operation, and for this'- purpose is provided with devices foi-*preventing the operation 'ot theI numeral keys and through them'of the traveling carriage,

while the general.operator is standing away from its normalposition. -My invention, therefore prevents attempted setting-up. of

numbers, througlrthe medium of the keys minion A. HART,

and carriage while the computation bar is in improper position. l

Other features and advantages will hereinafter appear.

This application is a division-.of my :ip-

plieation No. 466,836. filed. Beceinbe'r 10, 1908. I

ln ,the accompanying drawings: Figure l isa sectional side view-of an Underwood- Hanson combined typewriting and compute ing machine, showing so much thereof as is lconvenient to illustrate my invention as applied thereto; also showing the. general op lerator part way through yone of its` movements. Fig. 2 is .ifiaginentary view of part of Fig. l, showing normal position-of the parts. Fig. is a plan" view of part of Big. 2. Fig. 4 is a perspective view showing means for locking the numeral keys against depression. Fig. 5 is a plan'viewofan Underwood typewriter machine to which my invention is applied. Fig. G is a plan view of thecoinputiiig mechanism.

In the usual Underwood typewritiiig inachine, numeral keys I) and alphabet keys l depress their .key-levers to cause type- Paeentea .hay 4, i/oie.,

bars 3 to swing upwardly 'and rearwardly against the platen 14:, mounted in the usual travelingcarriage 2,`t o cause types to print thereon. The keys as they approach the platen operate a universal bar, not shown herein, forming part, of an escapement mechanism, which also includes an escapement wheel 2" and a pinion 2c to permit the typewriter carriage to be vdrawn along a Istep at a time by the usual spring barrel,

not shown herein. The fpinion 2c conti'ol's the vtypewriter carriage byffthe usual rack bar 2, with which it meshes.

As the typewriter carriage travels along,

'it moves computing or preliminary representation denominational bars r', which normally stand in an iiietlective'or idle position, io as to lift said bars and bring them within the range of pin-setting bars lil. Said pin-setting barsl are iach .fonncctcd to its o wn numeral key with thc result that it' any numeral key is depressed. its' pin-setf ting bar'will be depressed at the same time and depress the corresponding pin ci on whichever rack bar at the moment is raised into effective position. To bring the eom- Cli Iputation bars c within the range of the pinu setting bars 67, they. are lifted upwardly by means of a dog or decimal order selector that the rear end ofthe dog f' depresses scrz'atz'm the vertical rods f of which there is one foreach jack f1 and computation barc. Whenever a rod f is depressed, it rocks its lever f1 on which it rests, to cause said moves its pin-setting'bar 67 practically ver-1 tically downward, thereby setting or d-l' lever to lift up a linkage f2s forming part of a transposition device, which' ,in turn lifts the corresponding computation bar c. This transposition device ,is necessary, because the dog f is effective onv the jacks f1 beginning with the right-hand one, while.

in order to compute numbers in the usual manner 1t is necessary to begln wlth the left-hand numeral. To obtain this result,

the linkages of the transposition device form parts of parallel lnotion devices, which also include lugs f1, there being one lug for each computation bar c, and the levers f16 are of varying lengths so that each lever operates only its own linkage and therefore only its own computation bar.

.The numeral keys operate their pin-seti tinglinkages by stems 6 fast on the key* levers, said stems passing through a flange 62 'to guide them, and each stem 6 as it descends strikes on a rock arm fast on a link age-operating shaft 66, thereby rocking said shaft and depressing the corresponding pinsetting bar'67. To enable the rock shaft 66 to thus depress-the pin-setting arms each shaft 66 Vis provided with-a rock arm 612, which engages a bar 6, said bar 69 together with the, pin-setting bar 67 forming a parallel'motion device. |The connections are such that the depression of a numeral key pressing'a pin on the lifted computation bar 0. When a series of pms c has thus ,been depressed, one on each computation bar c, a general operator (or .operating car,- riage) which includes a cross-bar c is drawn forward, by pulling on a handle 013, so that said bar in coming forward will strike the ends of any depressed pins, (like therighthand pin in Fig. 1) and thereby drive the computation bars each to an .extent depend- '515 ing on its pin' depressed, As the computation bars lthus move forward they operatev number-bearing wheels or computing clef Y vices a by means of pinions a1, thereby ail-.df A

ing the numbers into said wheels, or devicesz; h y

nl ltionllnkages f1 agalnst being raised when ';.;}thje' general operator is not. at normal idle The handle 013 drives the general operator by' means 0f Segments 014, which mesh :i

idleI piriions 016, said pinions'k meshing 1:14

turn with rack bars c7 forming the side bars of the general operator. Said side bars c7,

the cross-bar 09, and the second cross-bar 01 together form the general operator, being a rigid rectangular frame. The bars c are returned by the cross bar 01 of the general operator on its return stroke. On the return stroke of the general operator, the wheels or devices a do not turn because 0f the pawl land* ratchet connections not shown herein between them and the pinions a1. At the very end of the returnv stroke of the general operator all of the set pins are restored to unset position by devices not shown herein.

In orde'r to prevent the operative from attempting to set `up pins when the general operator is not in its normal position, a lock is providedl for automatically locking the numeral keys unless said lock is released by the general operator. To enable this to be done, thestems 6 of the numeral keys are provided with extensions 611, which are fast thereon and which when a vnumeral key de- 615, said dogs forming an array having al limited throw. This throw is sufiicient to allow any single stem 617 to enter freely between its two dogs 615. lVh'enhQivever, one numeral key is depressed so as to bring its extension 617 between two dogs 615, said eX- tension takes .up all the throw of said array of dogs and prevents the depression of any other numeral key, because the extension 617 of any other numeral key'is unable to enter between its dogs 615. This simultaneous key-locking device, per se, forms no part of the invention claimed in the present application, and is fully disclosed in the application of which this is' ay division. This lock is utilized according lto the present invention for preventing any numeral key from being depressed when the general operator is moved forward from its normal idle' position. For this purpose there is provided between two dogs 615 at a point where it cannot interfere withvany extension 611, a locking-arm t1 which is fast on a rock shaft g, said -shaft being provided with a spring t2, which normally tends to thrust the arm t1 between the two dogs 615. lVhen the general operator is in its normal position, the cross bar 011 thereof bears against 4the front of the extension t of the locking-arm t1 and holds said arm clear of the dogs 61, with the result that the numeral keys can be freely operated. WVhen, however, the general operator moves forward, the spring t2 thrusts the arm t1 between the dogs 615, and

scends enter between pendent swinging ldogs `thereby closes up all the dogs 61 and locks' position. For this purpose there is 'provided an arm 22 fast on the rock vshaftt23 which .when the general operator moves forward linkages )m3, thereby locking them. To accomplish this, one of the side bars c7 of the general operator is provided with a notch 1225, having a cam-shaped rear end, in which notch normally rests a rock arm t2* fast to the rock shaft 23. This arm is normally held down in place in said notch by a coil spring t2@ embracing one end of the rock shaft t2?. lVhen, however, the general operator moves forward, the arm Z524 rides out of its not-ch and swings the locking arm t forcibly down on the linkages 7m. This not only locks said linkages and thereby prevents any computation bar c from bei-ng raised, but also by means of the connections through the levers fm, rods fw, and jacks f1,

said locking arm prevents the dog` f from moving any `jack and therefore prevents the typewriter carriage from feeding past any jack. It is impossible therefore for any operative to wreck a machine by attempting to set up numbers when the general operator has been partly but not completely actuated.

Variations `may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

l. In a recording computing machine, the combination with computing devices having decimal orders, of a decimal order selector, transposing devices, for making the selective action of said selector effective on said computing devices in a direction opposite to the travel of the selector, operating means adapted to be operated lonce for each line written by the typewriter, and means for forcing thegtransposing devices into normal positions when the operating means is actuated.

2. In a recording computing` machine, the combination'with computing devices having decimal orders, of a decimal order selector, transp'osing bars for selecting` the decimal orders of the lcomputing devices in a reverse direction to the travel of said selector. a movable arm for forcing said transposing bars into normal positions. and means for actuating said arm, substantially as described.

3. In a recording computing machine, the

combination with computing` devices having and said rock shaft, and common means for operating said computing devices and said rock shaft, substantially as described.

4. In a combined typewriting and computing machine, the combination With typedevices operated thereby, of computing de vices, actuating means therefor, and means for locking said numeral keys in inoperative positions during the operation of said actu ating means.

G. In a, combined typewriting and computingI machine, the combination with parts in which numbers are" temporarily set up, of computing devices into which the set up numbers are carried, a general operator for so carrying them, numeral keys for setting up the numbers, and means for locking said numeral keys against actuation when said general operator has been partly but not completely actuated. y

7. In a combined typewriting and computing machine, the combination with computing devices` numeral keys and keys for writing any desired words, said numeral keys also controlling vsaid computing devices, of a general operator for carrying the numbers written by said last-mentioned keys into the computing devices, and means for locking said last-mentioned keys only when said general operator is moved from normal position. leaving said other keys free'to write words at this time. i

8. The combination with computing devices and numeral keys, of a general operator for carrying numbers indexed on the numeral keys into said devices, means for preventing simultaneous depression of two keys. and means associated therewith for locking all of the numeral keys when the general operator is moved out of normal position.

9. In a combined typewriting and computing machine, the combination with computing devices and typewriter numeral keys, of a general operator movable for carrying numbers written by said keys into said devices, a traveling carriage for determining into which devices said numbers shall be carried` and means for prewnting movement of said carriage by said keys while said operator is moved from normal position.

l0. In a combined typewriting and computing machine, the combination with type- -writer numeral keys and devices, of denominational members movable fi'om ineffective to effective position to enable said keys to be effective thereon, a carriage for so moving said members, a general operator for carry ing numbers from said nien'ibers into said wheels. and means for preventingr movement of said carriage by said keys while said operator is moved from normal position.

1l. In a combined typewriting and con puting machine the combination with typewi'iternumeral keys and computing4 devices, of denominational members movable from inetlective to effective position to enable said keys to be effective thereon, a carriage for so moving said members. a geiieral operator for carrying` numbers from said members into said wheels and means 'tor preventing` movement of said carriage while said operator is moved from normal position. through the locking otl said keys. y

1:2. In a combined typewriting and computing machine. the combinatioii with typewriter numeral keys and computing devices, of denominational members on which numbers may be set up by said keys. said members being normally clear of said keys. a traveling carriage under the control of said keys. means operated by said 'arriage for lifting said members Scifi/tint within the range of said keys. a general operator for carrying' the numbers set into said devices.'

and a bar made ei'lective by said general operator when moved vfrom its normalposition to positively hold said liftingr means against actuation.

13. In a combined typewrit'ing and computing machine. the combination with nuineral keys` con'iputing devices and a general operator, of a series ot dogs coperating with said keys to prevent simnltaneous depressioi'iv tliereot7 a lug i'iormally tending to cooperate with said di'igs to lock said keys against actuation. and means connected to said general operator to hold said lug;r ineffective while said perator is in its normai position,

l. In a combined 'typewritingr and com-- put le machine. the con'ibination with conr puting` devices. of numeral keys for setting; up numbers to be carried into said Comput-- ingr devices. a general operator for carrying into said comenting devices numbers set up by said keys. a bai' forn'iingpart of sais general operator. and a follower under conA trol ot said bar to positively prevent the setting up of numbers by said keys.

15, In a combined typewriting' and ycon piiting machine, the combination with nnmeral keys and computing devices, of a Itreneral operator for carrying; numbers written by said keys into said devices. connections `between said typewri'tiiigl' mechanism and said computing mechanism. a member eil fective to lock said connections. a spi-ingr normally tending to make said member ci'- fectivc. and means forming partot said gennominational eral operator for normally holding said member ineli'ective.

ll. In a combined typewriting and coinpatine` machine. the combination with niisaid carriage to make said keys thus cll'eci tive. a general operator for causing said demembei's to compute. and means eli'ective on said transposition device operated by said general operator to render said device ineffective when said general operator is moved from its normal position.

1S. In a combined typewritingr and coniputing machine. the combination with numeral keys and computing devicesA ot dcnoiniiiational members on which numbers written by said keys are set up. a general operator-for carrying` the set up numbers into said devices. and including a cross-bar. said bar normally lyingT adjacent said keys. a series otl dogs for preventing simultaneous depression of two keysr a lugr normally tending` to enter between said dogs and lock said keys. and means connecting the said lug and under the control ot' said cross-bar for normally holding;- said luginetl'ectivc.

if). In a combined typewritingl and computing machine. the combination with numeral keys and computing devices coiitrollcd thereby. of means for preventing simultaneous depression of said keys. coinprising a series of members a giiideway' in which said members normally loosely fit. said members beingr so arranged in said guideway that the depression ot' a key interposesa part between said members. so thattlie members then completely lill said guideway. and prevent the actuation of a second key. a general operator for carrying numbers into the computing devices ui'idcr the control of said keys. and in eans controllci'l by said general operator to intei'pose an element between said members in said guidewayv` to thereby completely fill said guide way. and thereby prevent the operation of any keys at sucli'tinie.

FREDERICK A. HART. dvi tnesses IV. O. IVEsi'riiAL. rIi'Lirs Dtfc'iisrisi.. 

